I probably have a bit of a relaxed attitude towards these things, but you're talking maybe 10 seconds worth of stress while you transfer them to their fabulous new digs so I'd probably just do it when it's convenient. Since they aren't used to handling I guess they might be easiest to catch if you can do it when they are asleep?

This may be the all time greatest temporary holding enclosure a group of A. callidryas will ever see